giúp e với ạ! E cảm on
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1 had worked - went - is travelling
2 do you do - worked
3 had gone
4 got - had gone
5 met - hadn't seen
6 was making
7 is having
8 is making - makes
9 am wearing
10 is reading
11 borrows - remembers
12 is he doing - think - is polishing
13 saw - was painting
14 was reading
15 went
16 was discovered
17 drinks - drank
18 does she do - plays - watches
19 are waiting
20 had left
\(CuO+H_2\underrightarrow{^{t^0}}Cu+H_2O\)
=> Phản ứng thế
\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)
=> Phản ứng hóa hợp
\(Cu\left(OH\right)_2\underrightarrow{^{t^0}}CuO+H_2O\)
=> Phản ứng phân hủy
\(3Fe+2O_2\underrightarrow{^{t^0}}Fe_3O_4\)
=> Phản ứng hóa hợp
\(2KClO_3\underrightarrow{^{t^0}}2KCl+3O_2\)
=> Phản ứng phân hủy
\(Ba+2H_2O\rightarrow Ba\left(OH\right)_2+H_2\)
=> Phản ứng thế
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
=> Phản ứng thế
23 Has Nga read
24 Have they played
25 Have - already washed
26 Is -travelling
7 makes
8 started
9 are - are playing
cái này áp dụng hệ thức lượng thôi bạn
AH=căn 6^2-4,8^2=3,6cm
=>AC=6^2/3,6=10cm
1. bag
2. bunch
3. slice
4. box
5. piece
6. carton
7. can
8. bowl
9. jar
10. bottle
Bài 1 : look and write have or has
2) has 3) have 4) has 5) have 6) have
Bài 2 : look at exercise 1. Write questions and answers
2. does Zoe have a goldfish
Yes, he does
3. do Dave and Brian have a model plane
No, they don’t
4. does the alligator have a long tail
Yes, it does
5. do Zoe, Dave and Brian have a picnic basket
Yes, they do
6. does Brian have a new bike
Yes, he does
Bài 3 : look. Write the correct sentences
1. She doesn’t have red hair. She has brown hair
2. Brian doesn’t have a small glasses. He has big glasses
3. Dave and Brian don’t have long hair. They have short hair
4. Corky doesn’t have a small beak. It has a big beak
5. Vicky doesn’t have a green dress. She has a blue dress
6. They frogs don’t have short legs. They have long legs
Bài 4 : put the words in the correct order. Write true answers
1. Do you have red hair ?
Yes, I do/ no I don’t
2. Does your best friend have a bike ?
Yes, he does/ no, he doesn’t
3. Do we have a new teacher ?
Yes, we do/ no we don’t
4. Do people have beaks ?
Yes, they do/ no they don’t
5. Do you have a computer ?
Yes, I do/ no I don’t
6. Does a frog have a tail ?
Yes, it do/ no it doesn’t